Related Experiment Video
Updated: Jun 11, 2026

Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
Published on: September 11, 2016
Soil radon and elemental mercury distribution and relation to magmatic resurgence at long valley caldera
Abstract:
The response of a large geothermal system to magmatic resurgence was analyzed by a survey of soil gas radon and elemental mercury at 600 sites in the silicic Long Valley Caldera, California. The broad geochemical anomaly over the caldera has superimposed on it a small zone of pronounced radon enrichment and mercury depletion coincident with the surface projection of a postulated dike of rising magma. Soil gas geochemistry studies can complement traditional geophysical and geodetical methods in the evaluation of potential volcanic eruption hazards.
Related Concept Videos
The Sulfur Cycle
The Soil Ecosystem
Radioactive Decay and Radiometric Dating
Conditions on Early Earth
Soil Microbial Ecology
Acid Mine Drainage

